Title: Distribution of amino groups on a mesoporous silica surface after submonolayer deposition of aminopropylsilanes from an anhydrous liquid phase
Authors : Salmio, Hanna
Brühwiler, Dominik
Published in : Journal of Physical Chemistry Part C
Volume(Issue) : 111
Issue : 2
Pages : 923
Pages to: 929
Publisher / Ed. Institution : American Chemical Society
Issue Date: 2007
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subjects : Silica; Mesopores; Amine; Functionalization
Subject (DDC) : 540: Chemistry
Abstract: The reaction of mesoporous silica MCM-41 with various aminopropylsilanes was investigated. The distribution of grafted amino groups after submonolayer deposition from anhydrous toluene was probed by fluorescein labeling in conjunction with photoluminescence spectroscopy and pore size analysis. Monoalkoxysilanes generally distributed more uniformly than monopodal and dipodal trialkoxysilanes. The outcome of the grafting reaction additionally depended on the nature of the amino group. Secondary amines grafted more efficiently than their primary analogues. Moreover, it was found that the polarity of the solvent strongly affects the distribution of the amino groups in the case of strongly interacting aminopropylsilanes.
Departement: Life Sciences und Facility Management
Publication type: Article in scientific Journal
DOI : 10.1021/jp0651440
ISSN: 1932-7447
URI: https://digitalcollection.zhaw.ch/handle/11475/2348
Appears in Collections:Publikationen Life Sciences und Facility Management

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